Contingencies (Details) $ in Millions	3 Months Ended
Aug. 31, 2016 USD ($)
Independent Contractor California [Member]
Loss Contingency [Line Items]
Litigation Settlement Amount	$ 228
Multidistrict Independent Contractor Litigation [Member]
Loss Contingency [Line Items]
Litigation Settlement Amount	$ 204

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration